From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 197009] New: /proc/cpuinfo does not update frequency
Date: Wed, 20 Sep 2017 18:55:27 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=197009
Bug ID: 197009
Summary: /proc/cpuinfo does not update frequency
Product: Power Management
Version: 2.5
Kernel Version: 4.13
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
Assignee: linux-pm@vger.kernel.org
Reporter: aleksey@rybalkin.org
Regression: No
Created attachment 258537
--> https://bugzilla.kernel.org/attachment.cgi?id=258537&action=edit
kernel config
The 4.13 kernel with intel_pstate=passive (or active) does not appear to
correctly update the CPU frequency in /proc/cpuinfo
After booting the reported frequency (but not the real frequency) is stuck on
one value and does not update:
$ grep MHz /proc/cpuinfo
cpu MHz : 2194.859
cpu MHz : 2194.859
cpu MHz : 2194.859
cpu MHz : 2194.859
hardware: ThinkPad X250
cpu: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
kernel: 4.13.3 vanilla (config attached)
As far as I remember this worked in 4.11 and broke after 4.12, I can double
check if needed.
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